The creation of the notebook is stopped at the point where the problem originates.
Simply modify the content of the field to remove the blocking element and allow the travel book to be created in its entirety.
For example, if the creation of a travel book ends on an accommodation on the web site URL, you need to go to this accommodation in Planning Motion and recopy the web address there.
Or replace it with a word, a letter, whatever, just replace the content of the field with something else. It's surely the content of this field that's causing the problem.
Next, the travel book should be created in its entirety. If it doesn't, simply do the same thing at the point where the creation of the travel book stops again.